During the 1800s, reformer Dorothea Dix primarily worked to improve conditions in prisons and hospitals.
form labor unions in mills and factories.
preach sermons at revival meetings.
provide everyone with access to education.

A.  improve conditions in prisons and hospitals.

Explanation:

Wakanda is home to a lot of Vibranium, one of the strongest metals in the Marvel Universe. To keep it out of the wrong hands, the ancestors isolated themselves. ... If it's advanced technology were to be put into the wrong hands, like the ancestors were worried about, it would be devastating